mysql中利用函數(shù)與過程過濾html標(biāo)簽

2024-07-24 12:39:46

字體：大中小

供稿：網(wǎng)友

如果要過濾html標(biāo)簽多半同學(xué)都使用php的函數(shù)了,但是大家不知道是可以直接在mysql中進(jìn)行去除htm標(biāo)簽吧,下面一起來看看吧.

mysql本身沒有去除html代碼的內(nèi)置函數(shù),但是在一些情況下,不得不在數(shù)據(jù)庫層次提取一些去除了html代碼的純文本.

經(jīng)過谷歌后,找到了以下兩個函數(shù),經(jīng)測試,均可用.

函數(shù)1,代碼如下:

SET GLOBAL log_bin_trust_function_creators=1;

DROP FUNCTION IF EXISTS fnStripTags;

DELIMITER |

CREATE FUNCTION fnStripTags( Dirty varchar(4000) )

RETURNS varchar(4000)

DETERMINISTIC

BEGIN

  DECLARE iStart, iEnd, iLength int;

    WHILE Locate( '<', Dirty ) > 0 And Locate( '>', Dirty, Locate( '<', Dirty )) > 0 DO

      BEGIN

        SET iStart = Locate( '<', Dirty ), iEnd = Locate( '>', Dirty, Locate('<', Dirty ));

        SET iLength = ( iEnd - iStart) + 1;

        IF iLength > 0 THEN

          BEGIN   --Vevb.com

            SET Dirty = Insert( Dirty, iStart, iLength, '');

          END;

        END IF;

      END;

    END WHILE;

    RETURN Dirty;

END;

|

DELIMITER ;

SELECT fnStripTags('this <html>is <b>a test</b>, nothing more</html>');

函數(shù)2,代碼如下:

CREATE FUNCTION `strip_tags`($str text) RETURNS text

BEGIN

    DECLARE $start, $end INT DEFAULT 1;

    LOOP

        SET $start = LOCATE("<", $str, $start);

        IF (!$start) THEN RETURN $str; END IF;

        SET $end = LOCATE(">", $str, $start);

        IF (!$end) THEN SET $end = $start; END IF;

        SET $str = INSERT($str, $start, $end - $start + 1, "");

    END LOOP;

END;



select strip_tags('<span>hel<b>lo <a href="world">wo<>rld</a> <<x>again<.');